add aprs page

Author: vfat

aprs.md

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+---
+label: APRs
+---
+
+# APRs
+
+### Reward APR
+
+Reward APR is based on token rewards. These are emitted every second, so the calculated APR closely matches the expected returns.
+
+Projects usually set these on a weekly basis, for example Aerodrome sets reward rates for each pool every Thursday at 00:00 UTC. The reward rate is then fixed until the next epoch change.
+
+### Fee APR
+
+Fee APR is based on swap fees. These only accrue whenever a swap takes place in that pool. In order to calculate an APR estimate we take the previous 7 days worth of swap fees and compare with the current amount of funds in the pool.
+
+This is a rough estimate, and the actual returns may vary, as the previous week's swap volume may not be representative of the current week.